Coil



FIG. 1 is a front isometric view of a coil showing my new design;

FIG. 2 is a top plan view of the coil;

FIG. 3 is a bottom plan view of the coil;

FIG. 4 is a side view of the coil;

FIG. 5 is a side view of the coil;

FIG. 6 is a side view of the coil; and,

FIG. 7 is a side view of the coil.

The broken lines depict portions of the coil that form no part of the claimed design. 

CLAIM The ornamental design for a coil, as shown and described. 